001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019package org.apache.hadoop.hbase.master.balancer;
020
021import java.io.InterruptedIOException;
022
023import org.apache.hadoop.hbase.ScheduledChore;
024import org.apache.yetus.audience.InterfaceAudience;
025import org.slf4j.Logger;
026import org.slf4j.LoggerFactory;
027import org.apache.hadoop.hbase.master.HMaster;
028import org.apache.hadoop.hbase.master.LoadBalancer;
029
030/**
031 * Chore that will feed the balancer the cluster status.
032 */
033@InterfaceAudience.Private
034public class ClusterStatusChore extends ScheduledChore {
035  private static final Logger LOG = LoggerFactory.getLogger(ClusterStatusChore.class);
036  private final HMaster master;
037  private final LoadBalancer balancer;
038
039  public ClusterStatusChore(HMaster master, LoadBalancer balancer) {
040    super(master.getServerName() + "-ClusterStatusChore", master, master.getConfiguration().getInt(
041      "hbase.balancer.statusPeriod", 60000));
042    this.master = master;
043    this.balancer = balancer;
044  }
045
046  @Override
047  protected void chore() {
048    try {
049      balancer.setClusterMetrics(master.getClusterMetricsWithoutCoprocessor());
050    } catch (InterruptedIOException e) {
051      LOG.warn("Ignoring interruption", e);
052    }
053  }
054}